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临清坳陷是我国东部重要的油气资源研究区.采用储层沉积学、地层学及石油地质学等多种学科研究方法,对临清坳陷煤成气储层沉积结构特征及储层砂体空间分布进行研究,在此基础上总结了典型储层沉积体系和沉积相的空间分布,这对于该区油气资源勘探具有重要意义.研究结果表明:该区中晚二叠世是陆表海盆地由海相向陆相沉积转换的后期,因此主要沉积体系以大型河控浅水三角洲沉积体系和河流-湖泊复合沉积体系为主.临清坳陷二叠系储层砂体沉积结构可分为4种典型类型,为河床滞留相与泛滥平原相组合(CL-FP)、边滩相与天然堤相组合(PB-NL)、分流河道相与分流间湾相组合(DC-IB)和决口扇相与泛滥平原相组合(CV-FP).全区储层沉积砂体呈现一定不均性,中二叠系砂体较厚,向西北、西南方向变薄.晚二叠系砂体局部地区厚度很大,呈现东西厚中间薄特点,成为该区最好的储层砂体.研究结果为该区煤成气资源下一步勘探主要目标提供指导意义.
Linqing Depression is an important oil and gas resources research area in the eastern part of our country.Based on various disciplinary research methods such as reservoir sedimentology, stratigraphy and petroleum geology, the sedimentary structural characteristics of coal gas reservoirs in Linqing depression and the characteristics of reservoir sand Based on which the spatial distribution of typical reservoir sedimentary systems and sedimentary facies is summarized, which is of great significance for the exploration of oil and gas resources in this area. The results show that the mid-late Permian Therefore, the major sedimentary systems are dominated by large-scale river control shallow water delta sedimentary system and river-lake composite sedimentary system, and the sedimentary structures of Permian reservoir in Linqing Depression can be divided into four typical (CL-FP), combination of bank and natural bank (PB-NL), distributary channel phase and shunt bay-phase combination (DC-IB) Flood plain assemblage (CV-FP) .The sedimentary sand bodies in the whole area showed a certain degree of heterogeneity, and the Middle Permian sand bodies were thicker and thinner to the northwest and southwest.The thickness of the local parts of the Late Permian sand bodies was very high Large, showing something thick in the middle of thin features, to become that The best reservoir sand bodies. The results for the area of coal into gas resource exploration next main objective to provide guidance.